Home / 2,215.19-3,056.92-1,220.56

Finding the Fourth Proportional to 2,215.19, 3,056.92 and 1,220.56

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Solution

The fourth proportional to 2,215.19, 3,056.92 and 1,220.56 is: 1,684.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,215.19 : 3,056.92 = 1,220.56 : x
  2. Step 2: Convert to fraction form
    2,215.19/3,056.92 = 1,220.56/x
  3. Step 3: Cross multiply
    2,215.19x = 3,056.92 × 1,220.56
  4. Step 4: Simplify right side
    2,215.19x = 3,731,154.28
  5. Step 5: Solve for x
    x = 3,731,154.28/2,215.19
  6. Step 6: Final answer
    x = 1,684.35

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.